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Science Chapter 3

Plate Tectonicts

TermDefinition
Continental drift The hypothesis that the continents slowly move across earth's surface.
Pangaea The name of a single land mass that began to break apart 200 million years ago and gave rise today's continents.
fossil The preserved remains or traces of an organism that lived in the past.
Mid-ocean ridge An undersea mountain chain where new ocean floor is produced; a divergent plate boundary.
deep-ocean trench A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.
sea-floor spreading
subduction
Created by: matt3041
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